CN221278297U

CN221278297U - Improved cross shaft type universal joint

Info

Publication number: CN221278297U
Application number: CN202323087253.0U
Authority: CN
Inventors: 李美杰; 童坤; 孟家健; 刘仙桃; 徐玉波; 唐锞
Original assignee: Taier Heavy Industry Co Ltd
Current assignee: Taier Heavy Industry Co Ltd
Priority date: 2023-11-16
Filing date: 2023-11-16
Publication date: 2024-07-05
Anticipated expiration: 2033-11-16

Abstract

The utility model discloses an improved cross shaft type universal joint, which comprises a cross shaft, wherein joint bearings are sleeved on shaft heads of the cross shaft, at least one joint bearing is provided with a second fork head, the other joint bearings are provided with a first fork head, and a lubrication assembly is arranged on the second fork head; the cross shaft is internally provided with a cross through hole, and the center of the cross shaft is provided with a first threaded hole communicated with the cross through hole; the lubricating assembly comprises an oil pipe, the second fork head is provided with an oil hole from outside to inside, the outer end of the oil hole is provided with an oil cup, the inner end of the oil hole is provided with a second threaded hole communicated with the oil cup, and two ends of the oil pipe are respectively connected with the first threaded hole and the second threaded hole. The utility model has simple and reasonable structure and easy maintenance, can effectively prevent the sealing failure of the universal joint, the failure of the flange connection and the like caused by severe working conditions, simultaneously avoid water and impurities from entering the universal joint and leaking oil caused by the collision damage of the oil cup, realize the rapid centralized oil injection spot maintenance of the cross shaft under the working conditions, prolong the service life of each part and save the maintenance cost.

Description

Improved cross shaft type universal joint

Technical Field

The utility model belongs to the technical field of transmission, and relates to an improved cross shaft type universal joint.

Background

Universal joints are widely used in transmission equipment in the metallurgical industry for coupling motors and rollers, such as cross-shaft universal joints, because of the large torque transfer and high transfer efficiency. In the actual application of the areas such as the steelmaking continuous casting section, the front section and the rear section of the rolling mill and the like, the transmission connecting shafts in the areas have the characteristics of large installed quantity and severe working conditions, high temperature, large vapor, large oxide scale and other impurities, so that the universal joint close to the roller side causes the sealing failure of the joint bearing due to the high temperature, and the joint bearing can generate the conditions of water inflow, impurity inflow and the like; in addition, the cross shaft is collided in the transportation process and the field installation space is narrow, so that oil cups on the four joint bearings are frequently collided and fall off, and water, impurities and the like can enter the joint bearings and oil leaks from the joint bearings; meanwhile, the connecting flange of the universal joint can also cause connecting failure due to water vapor corrosion. The service life of the universal joint can be greatly reduced under the above various conditions, so that the orderly production is affected, and even accidents occur. In addition, the universal joint is installed in a large number, the oiling workload is large during the operation and maintenance of the equipment, the traditional oiling and lubrication through the oil cups on the joint bearings is time-consuming and low in efficiency, the operation and maintenance time of the equipment is increased to a certain extent, and the production cost is increased. Therefore, for the technical problems of the universal joint under the severe working conditions, a universal joint which is high-temperature resistant, waterproof, corrosion resistant and convenient to maintain is needed, so that the purposes of prolonging the service life of the joint and improving the efficiency and the yield of a production line are achieved.

Disclosure of utility model

Aiming at the defects existing in the background technology, the utility model provides the improved cross shaft type universal joint which is reasonable in structure and easy to maintain, can effectively prevent the conditions of sealing failure, flange connection failure and the like of the universal joint caused by severe working conditions, simultaneously avoid the conditions of entering the universal joint and oil leakage caused by collision damage of an oil cup, and can realize the rapid centralized oil injection spot maintenance of the cross shaft under the working conditions, effectively prolong the service life of each part, save the maintenance cost and ensure the orderly production operation.

The technical scheme for solving the technical problems is as follows:

the utility model relates to an improved cross shaft type universal joint, which comprises a cross shaft, wherein four shaft heads of the cross shaft are respectively sleeved with a joint bearing, and the innovation is that: at least one joint bearing is provided with a second fork, the other joint bearings are respectively provided with a first fork, and the second fork is provided with a lubrication assembly; the four shaft heads of the cross shaft are internally provided with communicated through holes respectively and form a cross through hole, and a first threaded hole communicated with the center of the cross through hole is formed in the center of the cross through hole; the lubricating assembly comprises an oil pipe, an oil hole is formed in the second fork from the outer side to the inner side, an oil cup is arranged at the outer end part of the oil hole, a second threaded hole which is communicated with the oil cup is formed in the inner end part of the oil hole, and two ends of the oil pipe are respectively connected with the first threaded hole and the second threaded hole.

Preferably, the first threaded hole and the second threaded hole are respectively connected with two ends of the oil pipe through the mounting pipe joint.

Preferably, the second fork head is a flange type fork head, the oil hole is radially formed in the flange end of the second fork head, and the second threaded hole is perpendicular to the oil hole.

Preferably, the oil cup is a flat buckle type oil cup.

Preferably, the specifications of the first threaded hole and the second threaded hole are M10 x 1, the pipe joint is an M10 x 1-H type stainless steel pipe joint, the oil pipe is an M10 x 1-H type hose with an outer side wrapped with a layer of woven steel wire, the diameter of the oil hole is 8.5mm, and the end part of the oil hole is connected with the oil cup through an M10 x 1 thread.

Preferably, the contact surfaces of the first fork head and the second fork head for connection adopt nitriding treatment, the effective desalination layer is 0.35-0.5mm, and the hardness is more than or equal to 550HV.

Preferably, the joint bearing comprises an integral bearing outer ring sleeved on the cross shaft head, a sealing assembly is arranged between the edge of the bearing outer ring and the shaft head, a roller is arranged between the periphery of the shaft head of the cross shaft and the inner side of the bearing outer ring, and an adjusting pad is arranged between the end part of the shaft head of the cross shaft and the inner side of the bearing outer ring.

Preferably, snap rings are respectively arranged between the first fork head and the outer ring of the bearing of the knuckle bearing and between the second fork head and the outer ring of the bearing of the knuckle bearing.

Preferably, the seal assembly is a fluororubber member.

Compared with the prior art, the improved cross shaft type universal joint provided by the utility model has the following advantages that

The beneficial effects are that:

(1) The utility model has novel design, simple and reasonable structure, easy manufacture, use and maintenance, low cost and good high temperature and corrosion resistance effect.

(2) According to the utility model, the oil cup on the conventional cross shaft type universal joint bearing is omitted, the outer ring of the bearing is changed into the integral closed type, so that the conditions of water inlet, impurity inlet and oil leakage of the joint bearing caused by the fact that the oil cup is easily damaged by collision are effectively avoided, and the design life of the universal joint is ensured.

(3) According to the utility model, the lubrication assembly is additionally arranged on the second fork, so that the oil cup is changed from the original joint bearing to the circumferential surface of the flange of the second fork, and during oiling, lubricating oil flows from the second fork to the center of the cross through hole of the cross shaft through the oil pipe, and then lubricating oil is intensively supplied to the joint bearings on the four shaft heads, so that the oiling efficiency is high, the oiling effect is good, and the operation and maintenance cost of the universal joint is effectively reduced.

(4) According to the utility model, the sealing component of the joint bearing is changed into the high-temperature-resistant and corrosion-resistant fluororubber, so that the joint bearing is effectively prevented from sealing failure caused by severe working conditions such as high temperature, large vapor and the like, and further, the conditions such as water inflow, impurities, oil leakage and the like of the joint bearing are caused, and the service life of the universal joint is prolonged.

(5) According to the utility model, the wear-resistant and corrosion-resistant nitriding layer is obtained at the joint of the flange of the first fork head and the flange of the second fork head through nitriding treatment, so that the severe water vapor corrosion working condition is effectively overcome, the joint of the universal joint is reliable, and the service life of the universal joint is prolonged.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a second prong and lubrication assembly arrangement in accordance with the present utility model;

In the figure: 1. a first prong; 2. a cross shaft; 3. a knuckle bearing; 4. a second prong; 5. a lubrication assembly; 21. a cross through hole; 22. a first threaded hole; 31. a seal assembly; 32. a roller; 33. a bearing outer ring; 34. an adjustment pad; 35. a clasp; 41. an oil hole; 42. a second threaded hole; 51. an oil cup; 52. a pipe joint; 53. and (5) an oil pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. As used in the specification and claims of the present application, "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. are used merely to indicate relative positional relationships, which change when the absolute position of the object to be described changes accordingly. The present utility model is not described in detail in the present application, and is well known to those skilled in the art.

As shown in fig. 1 and 2, the improved cross-shaft type universal joint of the utility model comprises a cross-shaft 2, wherein the cross-shaft 2 is provided with four shaft heads, and the four shaft heads are respectively sleeved with a joint bearing 3; the innovation of the utility model is that: the device comprises a cross shaft 2, at least one joint bearing 3 of the cross shaft 2 is provided with a second fork 4, the other joint bearings 3 are respectively provided with a first fork 1, the first fork 1 and the second fork 2 are flange type forks and are connected with a connected piece through flange end surfaces, and the second fork 4 is provided with a lubrication assembly 5 for providing lubrication oil for the joint bearings 3 on the cross shaft 2; the four shaft heads of the cross shaft 2 are internally provided with communicated through holes respectively and form a cross through hole 21, a first threaded hole 22 communicated with the center of the cross through hole 21 is formed in the center of the cross through hole, and M10 x 1 threads are preferably selected for the first threaded hole 22; the lubrication assembly 5 includes an oil pipe 53, the second prong 4 is provided with an oil hole 41 from the outside to the inside, because the second prong 4 is of a flange structure, the oil hole 41 is preferably provided from the outside to the inside of the flange end of the second prong 4, the diameter of the oil hole 41 is preferably 8.5mm, the outer end of the oil hole is provided with an oil cup 51 by arranging M10 x 1 threads, the oil cup 51 is preferably a flat-buckle oil cup, the inner end position of the oil hole 41 is provided with a second threaded hole 42 which is communicated with and perpendicular to the oil hole 41 toward the flange end connecting surface, the second threaded hole 42 is preferably M10 x 1 threads, the first threaded hole 22 and the second threaded hole 42 are respectively provided with a pipe joint 52, the pipe joint 52 is preferably an M10 x 1-H type stainless steel pipe joint, two ends of the oil pipe 53 are respectively connected with the pipe joint 52 provided on the first threaded hole 22 and the second threaded hole 42, the oil pipe 53 is preferably wrapped with an M10 x 1-H type hose, one end of the outer layer of braided steel wire is a straight elbow, and the straight elbow is arranged at the second prong. When the lubricating oil is applied, the oil cup 51, the oil hole 41, the second threaded hole 42, the pipe joint 52, the oil pipe 53, the first threaded hole 42 and the cross through hole 21 are combined to form a lubricating oil path, lubricating oil is injected from the oil cup 51, flows to the center of the cross through hole 21 on the cross shaft 2 through the oil hole 42 and the oil pipe 53, and is supplied to the knuckle bearings 3 sleeved on the four shaft heads through the cross through hole 21, so that the lubrication of each knuckle bearing 3 is realized.

In this embodiment, in order to improve the reliability of the flange connection position of each first fork head 1 and each second fork head 4, the contact surface of the first fork head 1 and the second fork head 4 for connection adopts nitriding treatment, so that the effective desalination layer is 0.35-0.5mm, and the hardness is not less than 550HV.

In this embodiment, for promoting the sealing performance of joint bearing 3 and at the stability that high temperature, steam corrode, the many abominable operating modes such as scale impurity use, joint bearing 3 is including the integral bearing outer lane 33 of cover on the cross 2 spindle nose, bearing outer lane 33 border with be provided with seal assembly 31 between the spindle nose, seal assembly 31 prefers fluororubber to make, be provided with roller 32 between the spindle nose periphery of cross 2 and the bearing outer lane 33 inboard, be provided with adjustment pad 34 between the spindle nose tip of cross 2 and the bearing outer lane 33 inboard. Snap rings 35 are respectively arranged between the first fork head 1, the second fork head 4 and the bearing outer ring 33 of the knuckle bearing 3, so that the cross shaft 2 and the fork heads can be conveniently connected and installed.

After the structure of the traditional cross-shaft type universal joint is improved, the service life of the universal joint can be prolonged by 5-6 months under severe working conditions of equal high temperature, water vapor corrosion, more scale impurities and the like, meanwhile, the operation and maintenance cost is greatly reduced, the operation and maintenance efficiency is greatly improved, and the orderly production is effectively ensured.

Claims

1. The utility model provides an improvement formula cross axle universal joint, includes cross axle (2), joint bearing (3) are equipped with respectively to the cover on four spindle heads of cross axle (2), its characterized in that: at least one joint bearing (3) is provided with a second fork head (4), the other joint bearings (3) are respectively provided with a first fork head (1), and the second fork head (4) is provided with a lubrication assembly (5); the inside of the four shaft heads of the cross shaft (2) is respectively provided with a through hole communicated with each other and forms a cross through hole (21), and the center of the cross shaft is provided with a first threaded hole (22) communicated with the center of the cross through hole (21); the lubrication assembly (5) comprises an oil pipe (53), an oil hole (41) is formed in the second fork head (4) from the outer side to the inner side, an oil cup (51) is mounted at the outer end part of the oil hole (41), a second threaded hole (42) which is communicated with the oil hole is formed in the inner end part of the oil hole, and two ends of the oil pipe (53) are respectively connected with the first threaded hole (22) and the second threaded hole (42).

2. An improved cross-shaft universal joint as claimed in claim 1, wherein: the first threaded hole (22) and the second threaded hole (42) are respectively connected with two ends of an oil pipe (53) through an installation pipe joint (52).

3. An improved cross-shaft universal joint as claimed in claim 1 or 2, wherein: the second fork head (4) is a flange type fork head, the oil hole (41) is radially formed in the flange end of the second fork head (4), and the second threaded hole (42) is perpendicular to the oil hole (41).

4. An improved cross-shaft universal joint as claimed in claim 3, wherein: the oil cup (51) is a flat buckle type oil cup.

5. An improved cross-shaft universal joint as claimed in claim 3, wherein: the specification of the first threaded hole (22) and the second threaded hole (42) is M10 x 1, the pipe joint (52) is an M10 x 1-H type stainless steel pipe joint, the oil pipe (53) is an M10 x 1-H type hose with one layer of woven steel wires wrapped outside, the diameter of the oil hole (41) is 8.5mm, and the end part of the oil hole is connected with the oil cup (51) by arranging M10 x 1 threads.

6. An improved cross-shaft universal joint as claimed in claim 3, wherein: the contact surfaces of the first fork head (1) and the second fork head (4) for connection adopt nitriding treatment, so that the effective desalination layer is 0.35-0.5mm, and the hardness is more than or equal to 550HV.

7. An improved cross-shaft universal joint as claimed in claim 1, wherein: the joint bearing (3) comprises an integral bearing outer ring (33) sleeved on the shaft head of the cross shaft (2), a sealing assembly (31) is arranged between the edge of the bearing outer ring (33) and the shaft head, a roller (32) is arranged between the periphery of the shaft head of the cross shaft (2) and the inner side of the bearing outer ring (33), and an adjusting pad (34) is arranged between the end part of the shaft head of the cross shaft (2) and the inner side of the bearing outer ring (33).

8. The improved cross-shaft universal joint as claimed in claim 7, wherein: snap rings (35) are respectively arranged between the first fork head (1), the second fork head (4) and the outer ring (33) of the knuckle bearing (3).

9. An improved cross-shaft universal joint as claimed in claim 7 or 8, wherein: the sealing component (31) is a fluororubber piece.